U.S. Geological Survey, Branch Of Acquisition and Federal Assistance, Box 25046, Denver Federal Center, Denver, CO 80225-0046

66 -- HIGH RESOLUTION SIX-CHANNEL SEISMIC DATA LOGGERS DUE 060200 POC Marilyn Hutchison, Purchasing Agent, (303) 236-5900, ext. 327 or FAX 303-236-2710 E-MAIL: USGS, CR, Acquisiton & Federal Assistance, mhutchi@usgs.gov. Concerns having the ability to furnish the supplies described herein are requested to give written notification (including the telephone number for a point of contact) to the procuring office above within 45 calendar days from the date of this synopsis. The U.S. Geological Survey, Geologic Hazards Team, has a requirement for three (3) very high quality, six channel data loggers for deployment at remote field sites throughout the United States. Functional Specifications are as follows: Data Logger Specifications: High resolution, six channel seismic data logger with integral absolute timing, calibration, and state-of-health functionality providing console and data out functions by means of RS-232 ports. Shall be configured to operate with two three component sets of high quality force balance seismometers. Shall support user written software running under the OS-9 operating system. Shall operate from unregulated DC voltage over a wide range of environmental conditions with suitable surge protection. UltraSHEAR Configuration: Shall support diskless, tapeless unattended data collection operation. Technical Specifications are as follows: Data Logger Specifications: The data logger shall provide a general purpose Motorola 68030 CPU with 8 Mbytes of random access memory (minimum) and three available RS-232 asynchronous ports (minimum). The processor shall support data logger operating software and/or user supplied software running under the OS-9 operating system (provided in read-only memory). Six channels of 24-bit analogue to digital conversion (ADC) shall be supplied with 140 dB of dynamic range (minimum) and 120 dB of differential linearity (minimum) per channel as measured by standard USGS tests. The digitizer noise floor shall include no more than two spurious spikes representing negligible noise power, the largest being no more than 12 dB above background. Each digitizer channel input shall be differential with a range of +/-20 V (minimum) and shall include adequate electrical isolation and surge protection. The six digitizer channels shall be organized into two banks of three channels each with isolated signal grounds between banks. Sample rates of 1, 40 or 50, and 100 samples/s shall be available from each channel. Digitizer sampling and data time shall be provided by a precision free running crystal oscillator phase locked by means of an electrically controlled trim to an absolute time standard. Absolute time shall be provided by an integral global positioning system (GPS) receiver. Time shall be maintained to a 1 ms accuracy while the GPS receiver is synchronized and for 2 hours (minimum) when the GPS receiver is not synchronized. Calibration, control, and state-of-health capabilities shall include calibration enable logic, step and sine calibration signals, mass recenter logic, and three sensor mass position monitoring channels for each of the two banks of three digitizer channels. State-of-health monitoring shall also include channels for external battery voltage, internal temperature, and one 8-bit (minimum) channel available for user applications. Three RS-232 asynchronous ports (minimum) shall be provided, one for console control, one for data out, and one for user applications. The console port shall provide a system reset function on sensing a BREAK condition. All ports shall be adequately surge protected. The data logger shall operate from an unregulated battery voltage of 12 V with reverse polarization protection and shall draw no more than 16 W. The unit shall provide a low voltage shutdown, shall be environmentally sealed against moisture damage, and shall operate over a temperature range of -30 to 70 C. UltraSHEAR Configuration: Shall support diskless, tapeless, unattended data collection operation including user configurable event detection, Steim II data compression, data store-and-forward functionality, and communications error detection and retransmission in the DACOMMO protocol. Shall support command generation and user configuration via an interactive console session. UltraSHEAR shall be supplied in read-only memory. Based on information available at this time, and in accordance with 41 U.S.C. 253(c)(1), implemented by FAR 5.302-1, the Government considers the item specified as a sole source from Quanterra, Inc., Harvard, Massachusetts, and proposes to negotiate a contract with that firm on that basis. However, should additional sources be identified, they will be considered. Firms who feel that they can furnish the required supplies are invited to submit in writing an affirmative response to this announcement, and such other materials which correspond to the required items stated herein. This information will be evaluated and used to determine if competitive opportunities exist. Since no solicitation document exists, requests for such documents without accompanying information will be considered non-responsive to this request without further consideration. This notice may represent the Government's only official notice of this procurement. See Note 22. Posted 04/18/00 (W-SN446120). (0109)

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